Lower Columbia River Temperature Report for May 2026  
Generated 2026-05-18 04:27:07

  McNary Dam forebay on Columbia R. (MCNA) McNary Dam tailwater on Columbia R. (MCPW) John Day Dam forebay (JDY) John Day Dam tailwater (JHAW) The Dalles Dam forebay on Columbia R. (TDA) The Dalles tailwater Downstream (TDDO) Bonneville Dam forebay (BON) Cascade Island (CCIW) Warrendale (WRNO) Camas / Washougal (CWMW) Pasco - Columbia Rivers (PAQW)
Date Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05
05 01 52.4 53.0 53.4 0/24 52.9 53.1 53.4 0/24 53.3 53.5 54.2 0/24 53.4 53.7 54.1 0/24 53.5 53.8 54.1 0/24 53.6 53.8 53.9 0/24 53.5 53.8 54.2 0/24 53.4 53.8 54.2 0/24 53.6 54.0 54.5 0/24 --- --- --- 0/0 51.2 51.7 52.1 0/24
05 02 52.8 53.3 53.9 0/24 53.2 53.5 53.8 0/24 53.5 53.7 54.0 0/24 53.7 53.8 54.1 0/24 54.0 54.2 54.4 0/24 54.0 54.2 54.5 0/24 54.0 54.3 54.6 0/24 53.9 54.2 54.6 0/24 54.1 54.5 54.9 0/24 --- --- --- 0/0 51.4 51.9 52.4 0/24
05 03 53.0 53.8 55.3 0/24 53.6 53.8 54.3 0/24 53.6 53.9 54.6 0/24 53.9 54.2 54.5 0/24 54.2 54.5 54.8 0/24 54.3 54.5 54.7 0/24 54.3 54.7 55.4 0/24 54.2 54.7 55.3 0/24 54.4 54.9 55.5 0/24 --- --- --- 0/0 51.7 52.3 52.9 0/24
05 04 53.6 54.0 54.8 0/24 53.9 54.3 54.6 0/24 54.2 54.6 55.1 0/24 54.4 54.8 55.0 0/24 54.7 55.0 55.5 0/24 54.7 55.0 55.2 0/24 55.0 55.3 55.8 0/24 55.0 55.3 55.7 0/24 55.2 55.6 56.2 0/24 --- --- --- 0/0 52.3 52.8 53.4 0/24
05 05 53.9 54.6 55.6 0/24 54.5 54.8 55.3 0/24 54.3 54.7 55.3 0/24 54.7 55.1 55.4 0/24 55.3 55.6 55.9 0/24 55.3 55.5 55.7 0/24 55.5 55.8 56.2 0/24 55.4 55.8 56.3 0/24 55.6 55.9 56.4 0/24 --- --- --- 0/0 52.7 53.4 54.2 0/24
05 06 54.2 54.8 55.5 0/24 54.9 55.1 55.3 0/24 55.1 55.2 55.4 0/24 55.4 55.6 55.8 0/24 55.8 56.0 56.3 0/24 55.7 55.9 56.1 0/24 55.9 56.3 56.7 0/24 56.1 56.4 56.9 0/24 56.0 56.5 57.0 0/24 --- --- --- 0/0 53.7 54.2 54.7 0/24
05 07 54.9 55.2 55.5 0/24 55.1 55.4 55.7 0/24 55.4 55.6 56.0 0/24 55.9 56.0 56.3 0/24 56.2 56.4 56.5 0/24 56.1 56.3 56.4 0/24 56.2 56.5 56.9 0/24 56.3 56.6 57.0 0/24 56.3 56.7 57.3 0/24 --- --- --- 0/0 53.9 54.4 55.0 0/24
05 08 55.3 55.7 56.4 0/24 55.6 55.8 56.0 0/24 55.8 56.0 56.1 0/24 56.3 56.4 56.5 0/24 56.4 56.6 56.8 0/24 56.3 56.5 56.6 0/24 56.3 56.6 56.9 0/24 56.4 56.7 57.1 0/24 56.4 56.8 57.1 0/24 --- --- --- 0/0 54.4 54.7 55.1 0/24
05 09 55.4 55.7 56.1 0/24 55.7 56.0 56.5 0/24 56.0 56.4 56.8 0/24 56.5 56.8 57.4 0/24 56.7 56.9 57.3 0/24 56.6 56.8 57.1 0/24 56.4 56.8 57.3 0/24 56.6 57.0 57.5 0/24 56.6 57.0 57.5 0/24 --- --- --- 0/0 54.4 55.0 55.5 0/24
05 10 55.8 56.2 56.6 0/24 56.2 56.4 56.6 0/24 56.6 56.8 57.0 0/24 56.9 57.1 57.2 0/24 57.2 57.4 57.5 0/24 57.1 57.3 57.5 0/24 57.0 57.2 57.6 0/24 57.2 57.4 57.7 0/24 57.1 57.4 58.0 0/24 --- --- --- 0/0 54.5 54.8 55.1 0/24
05 11 55.9 56.6 57.7 0/24 56.5 56.7 57.1 0/24 56.6 56.9 57.7 0/24 57.0 57.2 57.7 0/24 57.2 57.5 57.8 0/24 57.3 57.4 57.6 0/24 57.2 57.5 57.9 0/24 57.3 57.7 58.2 0/24 57.3 57.8 58.3 0/24 --- --- --- 0/0 54.1 54.8 55.6 0/24
05 12 55.8 56.5 57.0 0/24 56.3 56.7 57.0 0/24 57.2 57.4 57.8 0/24 57.4 57.6 57.9 0/24 57.6 57.9 58.2 0/24 57.7 57.8 58.0 0/24 57.4 57.9 58.3 0/24 57.9 58.1 58.4 0/24 57.8 58.2 58.6 0/24 --- --- --- 0/0 54.9 55.4 55.9 0/24
05 13 56.4 56.7 57.1 0/24 56.6 56.8 57.0 0/24 57.1 57.2 57.7 0/24 57.5 57.6 57.8 0/24 57.7 57.9 58.2 0/24 57.6 57.9 58.1 0/24 57.9 58.1 58.2 0/24 58.1 58.2 58.3 0/24 58.1 58.2 58.3 0/24 --- --- --- 0/0 54.6 55.3 55.7 0/24
05 14 56.2 56.5 56.8 0/24 56.5 56.7 56.8 0/24 57.3 57.3 57.4 0/24 57.6 57.7 57.8 0/24 57.6 57.8 57.9 0/24 57.7 57.7 57.8 0/24 57.7 57.8 58.0 0/24 57.8 58.0 58.2 0/24 57.8 58.0 58.2 0/24 --- --- --- 0/0 53.9 54.5 55.2 0/24
05 15 56.2 56.4 56.8 0/24 56.4 56.5 56.8 0/24 57.2 57.3 57.4 0/24 57.6 57.7 57.8 0/24 57.6 57.7 57.9 0/24 57.6 57.7 57.8 0/24 57.4 57.5 57.7 0/24 57.5 57.7 57.8 0/24 57.6 57.7 58.0 0/24 --- --- --- 0/0 53.9 54.2 54.5 0/24
05 16 55.7 55.9 56.2 0/24 55.9 56.1 56.3 0/24 57.0 57.2 57.3 0/24 57.3 57.5 57.7 0/24 57.5 57.7 57.8 0/24 57.6 57.7 57.8 0/24 57.2 57.4 57.4 0/24 57.4 57.5 57.6 0/24 57.3 57.5 57.6 0/24 --- --- --- 0/0 53.5 53.7 54.0 0/24
05 17 55.2 55.5 55.7 0/24 55.5 55.8 56.2 0/24 56.5 56.6 56.9 0/24 56.8 57.0 57.2 0/24 57.1 57.3 57.7 0/24 57.2 57.4 57.7 0/24 57.1 57.4 57.7 0/24 57.3 57.5 57.9 0/24 57.1 57.5 58.0 0/24 --- --- --- 0/0 53.2 53.9 54.6 0/24
05 18 55.7 55.9 56.1 0/4 56.1 56.2 56.2 0/4 56.4 56.4 56.5 0/4 56.8 56.8 56.8 0/4 57.3 57.3 57.3 0/4 57.3 57.3 57.3 0/4 57.5 57.5 57.5 0/4 57.6 57.7 57.7 0/4 57.6 57.7 57.7 0/4 --- --- --- 0/0 54.3 54.4 54.4 0/4
05 19 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 20 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 21 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 22 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 23 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 24 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 25 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 26 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 27 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 28 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 29 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 30 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
05 31 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0 --- --- --- 0/0
>68.05 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
412		 0 0 0 0/
0		 0 0 0 0/
412

Temperature in Degrees Fahrenheit
<32 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 >86

Bold, red text denotes values above 68.05°F.
--- indicates No Data

NOTICE: This report is based on raw, unverified data.